CN218990194U - Length-adjustable support sheet - Google Patents

Abstract

The application discloses a length adjustable piece that props up includes: a first outer jacket fixing member, a first inner jacket movable member; the first casing fixing member includes: at least one first ribbed tube and a first fixed connection tube; one end of the first rib pipe is connected with the fixed end connecting pipe; the first inner sleeve movable member includes: at least one second ribbed tube and a second fixed connection tube; the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the inserted length is adjustable; the second end of the second rib pipe is connected with the second fixed connecting pipe. The length of the support piece can be adjusted, so that the length of the support piece can be flexibly adjusted to adapt to the size of the field pit. Through adjusting length, can also strengthen the supporting role to the hole arm, be favorable to improving the fastness, avoid long-time not hard up that leads to, be favorable to improving the security of constructor under the hole.

Description

Length-adjustable support sheet

Technical Field

The application relates to the technical field of installation engineering, in particular to a length-adjustable support sheet.

Background

In the related art, a longitudinal and transverse drainage ditch foundation pit between inner lines of a railway station and an electrified contact net pillar rectangular foundation pit are close to a line, large in depth and narrow in working face, and cannot be mechanically excavated, and can only be constructed in a manual vertical excavation mode. If the pit is deeper, the soil on the pit arm is likely to fall down and collapse, so that the personal safety hidden trouble is brought to operators.

Disclosure of Invention

The main objective of the present application is to provide a length-adjustable support sheet, so as to solve the above-mentioned problems.

To achieve the above object, according to one aspect of the present application, there is provided a length-adjustable support sheet, including: a first outer jacket fixing member, a first inner jacket movable member;

the first casing fixing member includes: at least one first ribbed tube and a first fixed connection tube; one end of the first rib pipe is connected with the fixed end connecting pipe;

the first inner sleeve movable member includes: at least one second ribbed tube and a second fixed connection tube;

the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the inserted length is adjustable;

the second end of the second rib pipe is connected with the second fixed connecting pipe.

In one embodiment, the device further comprises a transmission mechanism; the transmission mechanism at least comprises: the power transmission shaft is sleeved with the first ratchet mechanism at the middle part of the power transmission shaft; the force transmission gears are respectively sleeved on the force transmission shafts;

a force transmission rack fixedly arranged on the second rib pipe of the first inner sleeve movable part, and the force transmission rack is matched with the force transmission gear;

the gear seat is respectively arranged on the first rib pipe of the first outer sleeve fixing part; the force transmission gear is arranged in the gear seat;

when the length is adjusted, the first ratchet mechanism drives the force transmission shaft to rotate, the force transmission shaft drives the force transmission gear to rotate, and the force transmission gear drives the force transmission rack to move, so that the first inner sleeve movable part is adjusted to extend or retract into the first outer sleeve fixed part, and the length of the length-adjustable support piece is adjusted.

In one embodiment, the number of first ribbed tubes is 3; the distances between two adjacent first ribbed pipes are equal; the gear seat and the force transmission gear are respectively arranged on the first side rib pipes at two sides;

the number of the second ribbed pipes is 3; the distance between two adjacent second ribbed pipes is equal; and force transmission racks are respectively arranged on the second side rib pipes at two sides.

In one embodiment, the first fixed connecting pipe and the second fixed connecting pipe are respectively provided with a plurality of connecting parts; each connecting part is provided with a through hole for connecting adjacent support plates or square tubes.

In one embodiment, the first ribbed tube and the second ribbed tube are respectively provided with a plurality of through holes correspondingly, and are connected by adopting a connecting piece.

In one embodiment, the number of the first ribbed pipes and the second ribbed pipes is 3 respectively;

the distances between two adjacent first ribbed pipes are equal, the two adjacent second ribbed pipes are parallel, and the two adjacent first ribbed pipes are equal.

In one embodiment, the method further comprises: the first reinforcing pipes are arranged between two adjacent first rib pipes, and two ends of each first reinforcing pipe respectively prop against the two first rib pipes and are fixedly connected; for supporting said adjacent two first ribbed tubes.

In one embodiment, the first outer sleeve fixed member and the first inner sleeve movable member are made of aluminum alloy.

According to the technical scheme, the length-adjustable support piece comprises: a first outer jacket fixing member, a first inner jacket movable member; the first casing fixing member includes: at least one first ribbed tube and a first fixed connection tube; one end of the first rib pipe is connected with the fixed end connecting pipe; the first inner sleeve movable member includes: at least one second ribbed tube and a second fixed connection tube; the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the inserted length is adjustable; the second end of the second rib pipe is connected with the second fixed connecting pipe. The length-adjustable support piece is applied to the field of pit arm protection, can be set according to the size of a pit for site construction, and can be flexibly adjusted to adapt to the size of the site pit. Because can adjust length, so can improve the intensity to the support of hole arm, for the length-adjustable piece that props up, long-time support can lead to the support not hard up, drops, and length-adjustable piece that props up then can carry out length adjustment, along with the lapse of time, can adjust long team, like this, play the effect to the reinforcing top tightly of hole arm, improved the fastness to help improving the security of construction workman in the hole. In some special needs, for example, in the scenes of a longitudinal and transverse drainage ditch foundation pit between inner lines of a railway station and an electrified contact net pillar rectangular foundation pit, the vertical pit arm can be effectively and rapidly supported and protected, and the personal safety of constructors and railway transportation safety are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:

FIG. 1 is a schematic illustration of a length adjustable support sheet according to an embodiment of the present application;

FIG. 2 is a top view of a first garment attachment feature according to an embodiment of the present application;

FIG. 3 is a top view of a length adjustable buttress according to an embodiment of the present application;

FIG. 4 is an end view of another length adjustable support tab according to an embodiment of the present application;

FIG. 5 is an end view of another length adjustable support tab according to an embodiment of the present application;

FIG. 6 is a side view of another length adjustable support tab according to an embodiment of the present application;

FIG. 7 is a schematic view of a stop mechanism according to an embodiment of the present application;

FIG. 8 is a top view of a length fixing clip according to an embodiment of the present application;

FIG. 9 is a top view of a pit arm bracket according to an embodiment of the present application;

fig. 10 is a schematic view of a square tube and connector according to an embodiment of the present application.

Description of the reference numerals

001-length adjustable support; 002-length fixing support piece; 003-length adjustable ejector rod; 004-fixed ejector rod in length; 005-square tube; 0051-a connector; 11-a first casing fixing part; 111-a first ribbed tube; 1110-a through hole; 112-a first fixed connection pipe; 113-reinforcing the tube; 1121-a connection; 11211-a through hole; 12-a first inner sleeve movable member; 121-a second ribbed tube; 122-a second fixed connection tube; 1221-a connection; 12211-a through hole; 13-a first transmission mechanism; 131-a force transmission shaft; 132-a first ratchet mechanism; 1321-check ratchet; 1322-a first bidirectional ratchet; 1323-a second bidirectional ratchet; 133-force transmission gear; 134-force transmission rack; 135-a gear seat; 136-ratchet seat; 137-check pawl; 138-check pawl; 139-detent pawl shaft; 1310-a stop seat; 21-a third ribbed tube; 22-a third fixed connection pipe; 221-a connection; 2211-a through hole; 23-supporting rods.

Detailed Description

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present utility model and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations.

Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present utility model will be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the terms "mounted," "configured," "provided," "connected," "coupled," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The application provides a length adjustable support piece, see fig. 1, this length adjustable support piece 001 includes: a first outer jacket fixing member 11, a first inner jacket movable member 12.

In some embodiments, the first outer fixing member 11 and the first inner movable member 12 may be formed by splicing a plurality of hollow rigid pipes.

The first casing fixing member 11 includes: at least one first rib tube 111 and a first fixed connection tube 112; one end of the first ribbed tube 111 is connected to the fixed connection tube 112, and the other end is opened; the first inner housing movable member 12 includes: at least one second rib pipe 121 and a second fixed connection pipe 122; the first end of the second ribbed tube 121 is inserted into the first ribbed tube 111 through the other end of the first ribbed tube 111, and the inserted length is adjustable; a second end of the second ribbed tube 121 is connected to the second fixed connection tube 122.

In some embodiments, the number of the first ribbed pipes may be plural. When the number of the first rib pipes 111 is plural, the plural first rib pipes 111 may be disposed in parallel. The number of the second ribbed pipes 121 may be the same as the number of the first ribbed pipes 111, and the second ribbed pipes 121 may be disposed in one-to-one correspondence with the first ribbed pipes 111. That is, each of the second ribbed tubes 121 is inserted into a corresponding one of the first ribbed tubes 111, respectively.

The length-adjustable support piece is characterized in that the first inner sleeve movable part 12 is movably arranged in the first outer sleeve fixed part 11, the first inner sleeve movable part 12 can be adjusted to stretch out and draw back relative to the first outer sleeve fixed part 11 through the first transmission mechanism 13, so that the length of the support piece can be adjusted, the support piece can be used in a protection scene of a pit arm, the protection support piece can be arranged according to the size of a pit under construction on site, the length of the protection support piece can be flexibly adjusted, the size of a site pit is adapted to, and the support piece can effectively and quickly support and protect a vertical pit arm especially in a scene of a longitudinal and transverse drainage ditch foundation pit among railway station inner lines and an electrified contact net support rectangular foundation pit, so that the personal safety and railway transportation safety of constructors are improved.

In some embodiments, the manner of adjusting the insertion depth may be achieved by a connecting piece, and a plurality of through holes are respectively formed on the corresponding first rib pipe 111 and the second rib pipe 121, and the distance between two adjacent through holes may be flexibly set, for example, set to 2 cm, 3 cm, 4 cm, or 5 cm. Of course, the smaller the interval is, the more favorable is for finely adjusting the length of the whole length-adjustable support piece. The connecting piece can be used for connection, and the connecting piece can be a bolt and a nut.

Referring to the top view of the first sleeve-fixing part 11 shown in fig. 2, the number of the first rib pipes 111 is 3; a plurality of through holes 1110 are formed in each first rib pipe 111, and the number of through holes can be flexibly set. The adjacent two first rib pipes 111 are disposed in parallel at equal distances.

Similarly, in order to correspond to the structure of the first outer sleeve fixing member 11, the adjacent two second rib pipes in the first inner sleeve movable member 12 are equally spaced and arranged in parallel. The first rib pipe 111 is perpendicular to the first fixed connection pipe 112. A reinforcing pipe 113 is provided between two adjacent first rib pipes 111. Correspondingly, the number of the second ribbed pipes 112 is 3, and each second ribbed pipe 112 is perpendicular to the second fixed connection pipe 122,3 and parallel to the second ribbed pipes 112.

To achieve continuity of length adjustment, in one embodiment, the manner in which the insertion depth can be adjusted can be achieved by a transmission mechanism, see fig. 3, the length adjustable support piece further comprising a transmission mechanism 13, the transmission mechanism 13 comprising at least: the power transmission shaft 131 is sleeved with a first ratchet mechanism 132 at the middle part of the power transmission shaft 131; and the force transmission gears 133 are respectively sleeved on the force transmission shafts 131. A force transmission rack 134 fixedly arranged on the second rib pipe 121 of the first inner sleeve movable part 12, wherein the force transmission rack 134 is in matched contact engagement with the force transmission gear 133.

A gear seat 135 provided on the first rib pipe 111 of the first outer sheath fixing member 11; the force transmitting gear is disposed in the gear seat 135.

When the length is adjusted, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate, the force transmission shaft 131 drives the force transmission gear 133 to rotate, and the force transmission gear 133 drives the force transmission rack 134 to move, so that the second rib pipe 121 of the first inner sleeve movable part 12 is adjusted to extend or retract into the first rib pipe 111 of the first outer sleeve fixed part 11, and the length of the length-adjustable support piece is adjusted.

When the number of the first rib pipes 111 and the number of the second rib pipes 121 are one, the number of the gear seat 135, the force transmission gear 133 and the force transmission rack 134 is one. When the number of the first ribbed tubes 111 and the number of the second ribbed tubes 121 are plural, the number of the gear seat 135, the force transmission gear 133 and the force transmission rack 134 may be plural, for example, the number may be set to be one-to-one corresponding to the number of the ribbed tubes, or the number may be two, and the number may be set to be two, and may be set only on the side ribbed tubes.

In some embodiments, the number of the first ribbed pipes 111 is 3, and two adjacent first ribbed pipes 111 are equidistant, and a reinforcing pipe may be disposed therebetween. The gear seat 135 and the force transmission gear 133 are respectively provided on the first side rib pipes 111 on both sides.

The number of the second ribbed pipes 121 is 3, and the distances between two adjacent second ribbed pipes 121 are equal. Force transmission racks 134 are respectively provided on the second side rib pipes 121 on both sides.

In the present embodiment, the first coat fixing member 11 includes first side rib pipes 111 provided on both sides, respectively, and first middle rib pipes 111 provided in the middle; a first fixed connection 112. One end of the side rib tube 111 and one end of the middle rib tube 111 are respectively connected to the same side surface of the first fixing connection tube 112, and specifically, the connection and fixation can be realized in a welding manner. The first side rib pipe 111 and the first middle rib pipe 111 are hollow.

The first inner movable member 12 includes: a second side rib pipe 121 provided at both sides and a second middle rib pipe 121 provided at the middle part, respectively; and a second fixed connection pipe 122. The first end of the second side rib pipe 121 is inserted into the first side rib pipe 111 through the other end of the first side rib pipe 111. The first end of the second middle rib pipe 121 is inserted into the first middle rib pipe 111 through the other end of the first middle rib pipe 111. The second side rib pipe 121 and the second end of the second middle rib pipe 121 are connected to the same side of the second fixing connection pipe 122, respectively. In this way, the side rib pipes 121 and the middle rib pipes 121 of the first inner sheath movable member 12 can be extended and contracted in the side rib pipes 111 on both sides of the first outer sheath fixed member 11 and the middle rib pipe 111 provided in the middle. Thereby the effect of adjusting the length of the whole support piece can be achieved.

In some embodiments, the transmission mechanism 13 connects the first outer sleeve-fixed part 11 and the first inner sleeve-movable part 12; the first inner sleeve movable part 13 is driven by the transmission mechanism 13 to extend or retract into the first outer sleeve fixed part 11 so as to adjust the length of the length-adjustable support piece.

When the length of the length-adjustable support piece needs to be adjusted, the first ratchet mechanism 132 is rotated in a first direction, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate in the first direction, and the force transmission shaft 131 drives the force transmission gear 133 to rotate in the first direction; the force transmission gear 133 drives the force transmission rack 134 to move towards the first direction, and the force transmission rack 134 drives the first inner sleeve movable part to move towards the first direction; the first direction is a direction in which the first inner sheath movable member 12 protrudes away from the first outer sheath fixed member 11.

The first ratchet mechanism 132 rotates towards the second direction, the first ratchet mechanism 132 drives the force transmission shaft 131 to rotate, and the force transmission shaft 131 drives the force transmission gears 133 respectively sleeved at two ends to rotate towards the second direction; the force transmission gear 133 drives the force transmission rack 134 to move towards the second direction, and the force transmission rack 134 drives the first inner sleeve movable part to extend in; the second direction is a direction in which the first inner sheath movable member 12 is retracted into the first outer sheath fixed member 11.

In one embodiment, the first ratchet mechanism comprises: two bidirectional ratchets sleeved on the force transmission shaft; the two bidirectional ratchets are respectively used for dragging the force transmission shaft to rotate under the drive of external force, so that the gear is driven to rotate, and the rack moves to adjust the length of the length-adjustable support piece.

In one embodiment, the first ratchet mechanism may comprise a bidirectional ratchet, and the user may rotate the ratchet clockwise or counterclockwise by using a wrench to rotate the force transmission shaft clockwise or counterclockwise.

In one embodiment, referring to FIG. 3, the first ratchet mechanism 132 includes a non-return ratchet 1321 on either side of which are disposed a first bi-directional ratchet 1322 and a second bi-directional ratchet 1323, respectively.

Wherein, the non-return ratchet wheel 1321 is arranged on the ratchet wheel seat 136, the non-return ratchet wheel 1321 is provided with the non-return pawl 137, when in the supporting state, the non-return pawl 137 is always kept in the close contact state with the non-return ratchet wheel 1321 by the elastic force of the spring, and only when the first inner sleeve movable component 12 is recovered, the non-return pawl 137 can be separated from the non-return ratchet wheel 1321 in the artificial state. So that the first inner sheath movable member 12 can be retracted to the first outer sheath fixed member 11 described above.

When the length is required to be adjusted in site construction, a worker can use a wrench to sleeve on any one of the two-way ratchet wheels, and can rotate clockwise or anticlockwise so as to drive the transmission shaft to rotate clockwise or anticlockwise, so that two-way control is realized, and the first inner sleeve movable part 12 extends out of or retracts into the first outer sleeve fixed part 11. The first bidirectional ratchet wheel and the second bidirectional ratchet wheel can also be realized by adopting a six-edge shifting wheel with the bidirectional ratchet wheel, and a common wrench is used for rotating the six-edge shifting wheel to drive the bidirectional ratchet wheel to rotate. Because the handle is used, the action of lever force is achieved, so that the strength of a field worker is saved, and the effect of pushing the movable part of the first inner sleeve to move is improved. Particularly, under the condition that the movable part of the first inner sleeve extends out, the length-adjustable support piece can be in closer contact with the adjacent support piece, so that the whole pit arm support assembly is firmer, and the supporting effect of the pit wall is improved. The stopping pawl may function to prevent the ratchet from rotating in the opposite direction so that the ratchet rotates in only a single direction.

In one embodiment, referring to fig. 4, 5 and 6, the first fixed connection pipe 112 and the second fixed connection pipe 122 are respectively provided with a plurality of connection parts; each connecting portion is provided with a through hole for connection. Specifically, the first fixed connection pipe 112 is provided with a plurality of connection parts 1121; each connecting portion 1121 is provided with a through hole 11211 for connecting adjacent branch pieces; when in connection, the connection piece can be adopted for connection. For example, a bolt is used to pass through the through hole 11211 to achieve connection. Similarly, the second fixed connection pipe 122 is provided with a plurality of connection parts 1221; each connecting portion is provided with a through hole 12211 for connecting adjacent branch pieces.

In some embodiments, the detent mechanism may take the form of a detent ratchet other than the one described above, and referring to fig. 7, the detent mechanism includes the detent pawl 138 described above, a detent seat 1310 provided on a side rib tube on the first housing fixing member 11, and a detent pawl shaft 139 provided on the detent pawl seat 1310, and the detent pawl 138 described above is sleeved on the detent pawl shaft 139, and the detent pawl 138 may be rotated about the detent pawl shaft 139 to adjust the position to achieve the detent. As shown, the check pawl 138 is adjusted to a position in contact with the force transmission rack 134, the center axis of the check pawl 138 is at an obtuse angle to the force transmission rack, which can act as a stop to prevent the force transmission rack 134 from moving to the left, but the force transmission rack can move to the right. If stopping is not required, the check pawl 138 can be repositioned out of contact with the force-transmitting rack.

In one embodiment, the material of the first outer sleeve fixing member and the first inner sleeve movable member is an aluminum alloy.

The aluminum alloy has lighter density, and the aluminum alloy is used for manufacturing the length fixing support piece, so that the aluminum alloy has the effect of convenience in carrying on the premise of ensuring the supporting strength.

In a second aspect, the present application further provides a length-fixing support, where the length-fixing support has substantially the same structure as the length-adjustable support, and the length of the length-fixing support cannot be adjusted. There is no transmission mechanism.

Referring to fig. 8, the length fixing clip 002 includes: at least one third ribbed tube 21, two third fixed connection tubes 22. Both ends of the third ribbed tube 21 are respectively connected to the third fixed connection tube 22. The number of the third ribbed pipes 21 is 3, the third ribbed pipes are arranged in parallel, and the distances between two adjacent third ribbed pipes are equal. A plurality of support rods 23 are also included, the support rods 23 being used to connect adjacent ones of the third ribbed tubes 21. Two support rods 23 are arranged between the side rib pipe 21 and the middle rib pipe 21; between the middle rib pipe 21 and the side rib pipe 21 on the other side, 3 support rods 23 are provided.

In some embodiments, a plurality of connection parts 221 are provided on the third fixing connection pipe 22, and through holes 2211 are provided on the connection parts 221 for connecting adjacent support pieces. The number of the above-described connection parts 221 may be uniformly set to 4.

In a third aspect, the present application proposes a pit arm support, see fig. 9, which includes a plurality of support pieces connected end to end in sequence; wherein, the support sheet comprises a length-adjustable support sheet 001 and a length-non-adjustable support sheet 002; the pit arm assembly is of a polygonal structure, wherein at least one length-adjustable support sheet 001 as described in any one of the above is arranged on each side.

In some embodiments, the pit arm support is quadrilateral, and at least one length-adjustable support piece 001 is arranged on each side.

The above-mentioned hole arm support of this application is owing to set up at least one adjustable piece 001 of length to can adjust the length of this adjustable piece 001 of length according to the size of hole arm, thereby can guarantee the fastness of support, accomplish the support task. In the prior art, the sizes of the tunnels are not uniform in the actual construction scene, and no standard support is used for protection, so that accidents are very easy to occur when the tunnels are deeper. By adopting the pit arm support, the probability of accident occurrence can be greatly reduced, and the safety of workers on a construction site is improved.

In some embodiments, the pit arm support further comprises a top rod assembly, wherein the top rod assembly is positioned in a closed area surrounded by the pit arm support, and two ends of the top rod assembly are respectively connected with two opposite sides of the pit arm support and used for supporting the pit arm support; the ejector rod assembly comprises a plurality of ejector rods which are sequentially connected end to end.

Preferably, the ejector rod assembly comprises at least one length-adjustable ejector rod.

As shown, the ejector pin assembly includes one of the length adjustable ejector pins 003 and the length fixed ejector pin 004 described above.

In some embodiments, a plurality of square tubes 005 and a connection 0051 are also included. A square corner tube 005 is arranged between any two adjacent sides of the pit arm assembly; two side elevation of square angle pipe 005 connect the one end of adjacent piece respectively.

As shown in fig. 10, in some embodiments, a plurality of studs 0051 are respectively disposed on two adjacent side surfaces of the square tube 005, and when connected, the studs 0051 pass through the through holes of the connection parts of the support pieces, and then are locked by nuts. The distance between any two adjacent studs may be set to be the same. As shown, the number of studs that can be provided on each side is 4.

In some embodiments, the square corner tube 005 may stand at the corner of the foundation pit, 100 x 100 square steel tube may be used, and the height may be set to 0.5 meters.

The two support sheets are arranged between square corner tubes, can be made of 50 gamma-100 flat steel tubes, and have the height of 0.5 m, and are connected by bolts; the length of the length-fixed support sheet can be set to be 0.5 meter, 0.7 meter and 1 meter, and the length of the first inner sleeve movable part 12 of the length-adjustable support sheet when not extending can be set to be 0.5 meter, 0.7 meter and 1 meter, and the length of the first inner sleeve movable part 12 after extending is set to be 0.5+0.15 meter, 0.7+0.25 meter and 1+0.3 meter.

The following illustrates the steps of installation. The first step is to install a bracket, specifically, to suspend excavation when the foundation pit is excavated to 1 meter according to the designed position and the designed plane size, clean and level pit bottoms and pit arms, firmly connect two square corner tubes of one pit arm with a length-adjustable support sheet and a length-fixed support sheet at the pit bottoms by bolts, and tightly attach the pit arms, wherein the positions of the length-adjustable support sheet and the length-fixed support sheet can be placed randomly.

When the length is adjusted, the reversing handle is shifted to the extending position, the non-return pawl is pulled out, the non-return pawl is separated from contact with the non-return ratchet, and the six-edge shifting wheel on the length-adjustable support sheet is pulled by a common wrench, so that the first inner sleeve movable part 12 extends out of the first outer sleeve fixed part 11, the length is prolonged, and the square pipe is tightly propped against the pit arm. The non-return pawl is put back to enable the non-return pawl to be closely attached to the non-return ratchet wheel so as to prevent the ratchet wheel from rotating; the brackets of other pit arms are arranged by the same method, and all the support pieces are ensured to be propped against the pit arms so as to prevent the brackets from sliding downwards.

Secondly, installing other brackets, namely digging a foundation pit for 0.6 meter, and installing the brackets by adopting the method; the method is repeated circularly until the support is arranged to be 0.6-1 meter away from the designed elevation of the pit bottom, and the protective support is not arranged; then the pit bottom is excavated to the designed elevation by adopting a manual method, and the masonry is rapidly constructed to the bottom of the bracket according to the design.

Thirdly, dismantling the bracket, namely suspending the construction design masonry, dismantling the protective bracket arranged 1-2 steps above the masonry surface, and continuing the construction design masonry to the bottom of the bracket; and (3) repeating the steps circularly until the protective bracket is completely removed and the rest part of the foundation is constructed.

The support of this application comprises square angle pipe, support piece, ejector pin. The parts of the bracket are light in weight, simple in structure, easy to manufacture, easy to operate on site, high in applicability, capable of being assembled and disassembled at the pit bottom by a single person, free of special tools, capable of being customized and combined at will according to actual conditions on site, and flexible in mobility and setting length and width dimensions at will; the bracket can be self-supporting and does not fall down.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the utility model to the particular embodiments described, but is capable of modification and variation in light of the above teachings. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A length-adjustable support sheet, comprising: a first outer jacket fixing member, a first inner jacket movable member;

the first casing fixing member includes: at least one first ribbed tube and a first fixed connection tube; one end of the first rib pipe is connected with the first fixed connecting pipe; the first inner sleeve movable member includes: at least one second ribbed tube and a second fixed connection tube;

the first end of the second ribbed tube is inserted into the first ribbed tube through the other end of the first ribbed tube, and the inserted length is adjustable;

the second end of the second rib pipe is connected with the second fixed connecting pipe.

2. The length adjustable support of claim 1, further comprising a transmission mechanism; the transmission mechanism at least comprises: the power transmission shaft is sleeved with the first ratchet mechanism at the middle part of the power transmission shaft; the force transmission gears are respectively sleeved on the force transmission shafts;

a force transmission rack fixedly arranged on the second rib pipe of the first inner sleeve movable part, and the force transmission rack is matched with the force transmission gear;

the gear seat is respectively arranged on the first rib pipe of the first outer sleeve fixing part; the force transmission gear is arranged in the gear seat;

when the length is adjusted, the first ratchet mechanism drives the force transmission shaft to rotate, the force transmission shaft drives the force transmission gear to rotate, and the force transmission gear drives the force transmission rack to move, so that the first inner sleeve movable part is adjusted to extend or retract into the first outer sleeve fixed part, and the length of the length-adjustable support piece is adjusted.

3. The length adjustable support of claim 2, wherein the first ratchet mechanism comprises: two bidirectional ratchets sleeved on the force transmission shaft; the two bidirectional ratchets are respectively used for dragging the force transmission shaft to rotate under the drive of external force, so that the gear is driven to rotate, and the rack moves to adjust the length of the length-adjustable support piece.

4. The length adjustable support of claim 3, wherein said first ratchet mechanism further comprises: a non-return ratchet wheel disposed between the two bi-directional ratchet wheels;

when the length is not required to be adjusted, the non-return ratchet wheel is set to a stop state so as to prevent the rotation of the force transmission shaft, and when the length is required to be adjusted, the non-return ratchet wheel can be set to a non-stop state so that the force transmission shaft can rotate under the drive of the two bidirectional ratchet wheels.

5. The length adjustable support of claim 2, wherein the number of first ribbed tubes is 3; the distances between two adjacent first ribbed pipes are equal; the gear seat and the force transmission gear are respectively arranged on the first side rib pipes at two sides;

the number of the second ribbed pipes is 3; the distance between two adjacent second ribbed pipes is equal; and force transmission racks are respectively arranged on the second side rib pipes at two sides.

6. The length-adjustable support sheet according to claim 1, wherein a plurality of connection parts are provided on the first fixed connection pipe and the second fixed connection pipe, respectively; each connecting part is provided with a through hole for connecting adjacent support plates or square tubes.

7. The length-adjustable support plate according to claim 1, wherein the first ribbed tube and the second ribbed tube are respectively provided with a plurality of through holes, and are connected by connecting pieces.

8. The length-adjustable support plate according to claim 7, wherein the number of the first ribbed pipes and the second ribbed pipes is 3, respectively;

the distances between two adjacent first ribbed pipes are equal, the two adjacent second ribbed pipes are parallel, and the two adjacent first ribbed pipes are equal.

9. The length-adjustable support sheet according to claim 5, further comprising: the first reinforcing pipes are arranged between two adjacent first rib pipes, and two ends of each first reinforcing pipe respectively prop against the two first rib pipes and are fixedly connected; for supporting said adjacent two first ribbed tubes.

10. The length-adjustable support sheet according to any one of claims 1 to 9, wherein the material of the first outer sheath fixing member and the first inner sheath movable member is an aluminum alloy.

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